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POINTER

  1. What is Pointer?
    2. See Answer Ans: A pointer is a variable whose value is the address of another variable, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before using it to store any variable address.

  2. What is indirection operator?
    3. See Answer Ans: The indirection operator is a unary operator represented by the symbol (*). The indirection operator can be used in a pointer to a pointer to an integer, a single-dimensional array of pointers to integers, a pointer to a char, and a pointer to an unknown type.

  3. What is void Pointer?
    4. See Answer Ans: The void pointer, also known as the generic pointer, is a special type of pointer that can be pointed at objects of any data type! A void pointer is declared like a normal pointer, using the void keyword as the pointer's type: 1. void *ptr; // ptr is a void pointer

  4. How to declare a Pointer Variable?
    5. See Answer Ans: datatype * variable_name;
    eg. int *p;

  5. Is it possible to store address of int variable in float pointer?
    6. See Answer Ans:

  6. What is size of pointer variable of int type?
    7. See Answer Ans:

  7. What is size of pointer variable of char type?
    8. See Answer Ans:

  8. Is it possible to change the address of any variable?
    9. See Answer Ans:

  9. What is Generic Pointer?
    10. See Answer Ans: When a variable is declared as being a pointer to type void it is known as a generic pointer. Since you cannot have a variable of type void, the pointer will not point to any data and therefore cannot be dereferenced. It is still a pointer though, to use it you just have to cast it to another kind of pointer first.

  10. Explain pointer to pointer.
    11. See Answer Ans:

  11. What is pointer to array?
    12. See Answer Ans:

  12. When to use pointer to array?
    13. See Answer Ans:

  13. Is array variable a pointer variable?
    14. See Answer Ans:

  14. Does array variable contain base address of array?
    15. See Answer Ans:

  15. If the address of one location of float array is 112 then what will be the address of 2nd location?
    16. See Answer Ans:

  16. What is array of pointer?
    17. See Answer Ans:

  17. What is self refrential structure?
    18. See Answer Ans:

  18. What will be the output of?
      19. int x=7;
      printf("%d",*&x&x);
      See Answer Ans: